Quick Answer
Relying on GPS alone during an evacuation is not recommended due to signal loss, satellite visibility issues, and battery drain. It's essential to have a backup navigation system and to plan your route before relying on GPS.
Limited GPS Reliability
GPS signals can be disrupted by dense foliage, urban canyons, and mountainous terrain, leading to inaccurate readings or complete signal loss. In these situations, GPS may not provide reliable directions, making it difficult to navigate. It’s estimated that GPS accuracy can be compromised up to 10 miles in urban areas and up to 50 miles in mountainous terrain.
Alternative Navigation Methods
Develop a secondary navigation system that doesn’t rely on electronic devices. Learn to read a map, use a compass, and identify natural navigation landmarks such as the sun, stars, and topography. Additionally, consider investing in a handheld GPS device or a personal locator beacon (PLB) that can be used in emergency situations.
Route Planning and Preparation
When planning your evacuation route, research the terrain and potential obstacles, such as flooded areas, road closures, or hazardous materials. Identify alternative routes and consider mapping multiple paths to your destination. Keep a detailed route map and a backup power source for your GPS device in your emergency kit.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.